CVE-2026-102342

MediumCVSS 5.4

Published: 13/10/2026(UTC)Updated: 13/10/2026(UTC)Translated: 13/10/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.36%

28th percentile - higher than 28% of all known CVEs

Summary

ammonia is a Rust library for repairing and securing untrusted HTML. Prior to 3.3.3, 4.0.3, and 4.1.4, applications that allow the SVG animate or set elements can retain an animation whose attributeName targets href and whose value uses the javascript scheme. The sanitized SVG can therefore create a script-bearing link, and a user who clicks the link can execute attacker-controlled script in the application's origin, enabling stored cross-site scripting.

Risk Assessment

An attacker can inject persistent script into HTML/SVG content that executes in the victim's browser upon clicking a link, leading to session hijacking or data theft.

Recommendation

Upgrade the ammonia library to version 3.3.3, 4.0.3, or 4.1.4 (or later) and consider restricting SVG animate/set elements in untrusted HTML.

Other vulnerabilities in ammonia

CVE-2026-63430Medium
ammonia is a Rust library for repairing and securing untrusted HTML. Prior to 3.3.2, 4.0.2, and 4.1.3, applications that explicitly allow the math tag, annotation-xml, and at least one raw-text HTML element while disallowing the encoding attribute can permit mutation cross-site scripting. ammonia does not correctly implement annotation-xml's encoding-dependent MathML integration-point behavior after attribute filtering removes encoding, so the sanitizer validates a descendant under one namespace interpretation while the browser reparses the output under another.

Original NVD description (English source)

Vulnerability data from NVD (NIST) · CISA KEV · EPSS